Perennial Pepperweed
Lepidium latifolium L.
Perennial Peperweed is often found along streams and rivers where it can lead to significant erosion problems. (photo courtesy of Sue Donaldson, Univeristy of Nevada Cooperative Extension)
This was a perennial pepperweed root that was completely dug out of the ground. The plant was able to grow from the root piece that was left on the ground.